This is what is going on inside my head at the moment... (which is much more than what usually goes on...)
Nikon D300s? Canon 7D? Nikon D300s? Canon 7D? Nikon D300s? Cano.... etc, etc, etc....
I will be letting go of my current gear soon and will be getting one of the above (can't decide yet

). I have had a consumer level Canon before in the guise of a Rebel 350d, but have never owned Nikon. Either way it is really a lens question.
Once I have the camera I want a best value zoom in the 100-400 equivalent range or thereabouts. This is because I like portrait work and also find the zoom great for getting really tight shots. I also like to shoot some sports from time to time. I can't afford the £1500+ price tag for the good glass but will spend around £500-£600 (second-hand if required) for something that can deliver quality.... but note I can't tolerate a lens that will not give consistent sharp results with good AF....
Can anyone suggest something? I would even consider a prime if it fell around the 250mm equivalent.
Cheers everybody....please don't gear bash each other I am just after the pro's of what you have...
Pete